StorageManager

Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The StorageManager interface of the the Storage API provides an interface for managing persistance permissions and estimating available storage. You can get a reference to this interface using either navigator.storage or WorkerNavigator.storage.

Methods

StorageManager.estimate() Secure context: Returns a StorageEstimate object containing usage and quota numbers for your origin.
StorageManager.persist() Secure context: Returns a Promise that resolves to true if the user agent is able to persist your site's storage.
StorageManager.persisted() Secure context: Returns a Promise that resolves to true if persistence has already been granted for your site's storage.

Specifications

Specification	Status	Comment
Storage The definition of 'StorageManger' in that specification.	Living Standard	Initial definition.

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	48	?	57 51 — 57¹ ²	?	Yes	?
`estimate`	52	?	51	?	Yes	?
`persist`	52 48 — 52⁴	?	55	?	Yes	?
`persisted`	52 48 — 52⁵	?	55	?	Yes	?

Feature	Android webview	Chrome for Android	Edge mobile	Firefox for Android	Opera Android	iOS Safari	Samsung Internet
Basic support	48	48	?	51¹ ³	Yes	?	?
`estimate`	52	52	?	51	Yes	?	?
`persist`	52 48 — 52⁴	52 48 — 52⁴	?	55	Yes	?	?
`persisted`	52 48 — 52⁵	52 48 — 52⁵	?	55	Yes	?	?

1. See bug 1304966 and bug 1399038.

2. From version 51 until version 57 (exclusive): this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

3. From version 51: this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

4. Supported as requestPersistent.

5. Supported as persistentPermission.

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Chrome Full support 48	Edge ?	Firefox Full support 57 Full support 57 No support 51 — 57 Notes Disabled Notes See bug 1304966 and bug 1399038. Disabled From version 51 until version 57 (exclusive): this feature is behind the `dom.storageManager.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support 48	Chrome Android Full support 48	Edge Mobile ?	Firefox Android Full support 51 Notes Disabled Full support 51 Notes Disabled Notes See bug 1304966 and bug 1399038. Disabled From version 51: this feature is behind the `dom.storageManager.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android ?
`estimate`	Chrome Full support 52	Edge ?	Firefox Full support 51	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support 52	Chrome Android Full support 52	Edge Mobile ?	Firefox Android Full support 51	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android ?
`persist`	Chrome Full support 52 Full support 52 No support 48 — 52 Alternate Name Alternate Name Uses the non-standard name: `requestPersistent`	Edge ?	Firefox Full support 55	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support 52 Full support 52 No support 48 — 52 Alternate Name Alternate Name Uses the non-standard name: `requestPersistent`	Chrome Android Full support 52 Full support 52 No support 48 — 52 Alternate Name Alternate Name Uses the non-standard name: `requestPersistent`	Edge Mobile ?	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android ?
`persisted`	Chrome Full support 52 Full support 52 No support 48 — 52 Alternate Name Alternate Name Uses the non-standard name: `persistentPermission`	Edge ?	Firefox Full support 55	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support 52 Full support 52 No support 48 — 52 Alternate Name Alternate Name Uses the non-standard name: `persistentPermission`	Chrome Android Full support 52 Full support 52 No support 48 — 52 Alternate Name Alternate Name Uses the non-standard name: `persistentPermission`	Edge Mobile ?	Firefox Android Full support 55	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android ?

Legend

Full support: Full support
Compatibility unknown: Compatibility unknown
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.
Uses a non-standard name.: Uses a non-standard name.

StorageManager

Methods

Specifications

Browser compatibility

Legend

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